Michigan Terminal System

Michigan Terminal System (MTS)

The MTS welcome screen as seen through a 3270 terminal emulator.
Developer	University of Michigan and 7 other universities in the US, Canada, and the UK
Written in	various languages, mostly 360/370 Assembler
Working state	Discontinued
Initial release	1967
Latest release	6.0/1988 (final)
Available in	English
Platforms	IBM S/360-67, IBM S/370 and successors
Default user interface	Command line interface
License	Free (CC BY 3.0)
Official website	archive.michigan-terminal-system.org

The Michigan Terminal System (MTS) is one of the first time-sharing computer operating systems. Developed in 1967 at the University of Michigan for use on IBM S/360-67, S/370 and compatible mainframe computers, it was developed and used by a consortium of eight universities in the United States, Canada, and the United Kingdom over a period of 33 years (1967 to 1999).

The software developed by the staff of the University of Michigan's academic Computing Center for the operation of the IBM S/360-67, S/370, and compatible computers can be described as a multiprogramming, multiprocessing, virtual memory, time-sharing supervisor (University of Michigan Multiprogramming Supervisor or UMMPS) that handles a number of resident, reentrant programs. Among them is a large subsystem, called MTS (Michigan Terminal System), for command interpretation, execution control, file management, and accounting. End-users interact with the computer's resources through MTS using terminal, batch, and server oriented facilities.

The name MTS refers to:

MTS was used on a production basis at 12 or 13 sites in the United States, Canada, the United Kingdom, Brazil, and possibly Yugoslavia and at several more sites on a trial or benchmarking basis. MTS was developed and maintained by a core group of eight universities included in the MTS Consortium.